To be able to sell a domain name do I need to buy the domain name in a different way?
I wonder if I just buy a domain name for example from yahoo, can I sell the name to the third party?
Isn't that simple as buying and selling a car?
What are the important points that I should consider through this buying and reselling procedure?
Thank you very much.

I buy names through Godaddy.com, then when I sell the name, I just do an account change through Godaddy to their Godaddy account. It is a very simple transaction and the person then owns the name free and clear.

Probably others here can add more to this maybe with other registrars.